Generate public-private key pair

keygen.sh

#!/bin/bash
set -euo pipefail

NAME=${1:-}
mkdir -p "$HOME/.keys-pairs/$NAME"

cd "$HOME/.keys-pairs/$NAME"

PRIVATE_PEM="private.pem"
PUBLIC_PEM="public.pem"
PUBLIC_TXT="public_key.txt"

ssh-keygen -t rsa -b 2048 -m PEM -f "$PRIVATE_PEM" -q -N ""
openssl rsa -in "$PRIVATE_PEM" -pubout -outform PEM -out "$PUBLIC_PEM" 2>/dev/null
openssl rsa -in "$PRIVATE_PEM" -pubout -outform DER | base64 > "$PUBLIC_TXT"

rm "$PRIVATE_PEM".pub

echo "Public key to saved in $PWD/$PUBLIC_TXT"